/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMBlueprint.h
virtual void OnVariableTypeChanged ( const [FName](API\Runtime\Core\UObject\FName) & InVarName, [FEdGraphPinType](API\Runtime\Engine\EdGraph\FEdGraphPinType) InOldPinType, [FEdGraphPinType](API\Runtime\Engine\EdGraph\FEdGraphPinType) InNewPinType )